Within the current editions and conceptions, is SCP-105 aware that she could blind herself for becoming Naturalized?

I believe many people have already considered this. Her anomalous abilities must depend on vision. That means, if she were blind, that she could not use her abilities, and then she would become naturalized.

Just like SCP-682 would never be destroyed, I promise that I would never really let her blind and become a naturalized object in the tale. I would just let her attempt to do that, but give up or be stopped eventually.

Well… there is no canon. If you write it well enough for it to stay above deletion threshold, it stays on the site. That said, if you want this tale idea to work, you'll need either a compelling plotline or a prose style that grabs a reader for slice-of-life/stream-of-consciousness if there's no specific conflict driving the story.

I will say though, that this struggle of not wanting to have anomalous powers kind of reminded me of the tale Tracing about SCP-187. Maybe take a look at that? People in the discussion commented that they could sympathize with the speaker, so that might be a good place to start for how to approach your story.

Why would anyone in the lofty heights of the SCP foundation sanction the idea of someone who is, essentially in possession of a super-human ability to do something physically to themselves that could potentially create a seriously impaired mental state?

If it touch - you could try putting her in a sensory deprivation chamber permanently. Again, this would not be conducive to maintaining a healthy mental state.

The recorded effects of such a process make for interesting and horrifying reading.